I do not mean to be rude here, but who puts ketchup on a burger?, from rural kentucky and that is unheard of here, but i must say that if you paid for your food and you want ketchup, then you should have ketchup, it was your money so you should be able to use the condiments you want. I'm guessing ketchup eaters get their order to go and put ketchup on it in the car or at home. You can't stop folks from eating their food the way they want it.